New Holland CX720 Repair Manual page 3250

E0514-03-R Stubble Height / Flex R Shorted to High Source
(G.30.A.95.80 - G.30.B.54)
E0514-03 - R Stubble Height / Flex R Shorted to High Source
Cause:
The right skid plate sensor (R-13) circuit is shorted to high voltage, or the sensor ground is open.
Possible failure modes:
1. Sensor supply or signal wiring is shorted to high voltage (12 V).
2. Sensor ground wiring is open.
3. Module internal failure (internal regulator failure).
Solution:
1. Enter the InfoView™ monitor - "Diagnose info" screen.
Select "Header" sub menu.
Select "R Stubble Height / Flex R" and check voltage range. Manually raise the header above the ground, and
then lower the header fully against the ground to move the sensors through their operating range. The voltage
should stay within the range, and should change smoothly with header movement.
The proper voltage range for a properly adjusted sensor is 2.5 - 7.5 volts.
A. If the voltage reading is high (>9.8 V) out of range, continue with Step 2.
B. If the voltage reading is out of range, but between 0.3 - 7.9 volts, the sensor is operating properly, but
needs to be adjusted into the proper range. Refer to the header Operator's manual for proper adjustment
information.
C. If the voltage reading is within the proper limits, the circuit may not be open at this time. Continue the
troubleshooting at step 20.
NOTE: Visually inspect the wiring harness and connectors. Verify that the connector was fully installed. Inspect
the terminals and wires at the connector for pushed back or corroded terminals or damaged wires. Flex the
harnesses involved to reveal intermittent breaks or shorts in the wiring concerned.
2. The voltage reading on the InfoView™ monitor is low out of range. Disconnect connector X306 , and use a
multimeter to test for continuity to ground on connector X306 pin 1 .
A. If continuity is found, continue with step 8.
B. If no continuity is found, continue with step 3.
3. Disconnect connector X032 , and use a multimeter to test for continuity to ground on connector X032 pin 25 .
A. If continuity is found, there is an open circuit in the header (HH) harness between connector X306 pin 1
and connector X032 pin 25 wire 846 blue. Locate the open and repair.
B. If no continuity is found, continue with step 4.
4. Disconnect connector X007 , and use a multimeter to test for continuity to ground on connector X007 pin 28 .
A. If continuity is found, there is an open circuit in the feeder (FE) harness between connector X032 pin 25
and connector X007 pin 28 wire 846 blue or 748 blue. Locate the open and repair.
B. If no continuity is found, continue with step 5.
5. Disconnect connector X008 , and use a multimeter to test for continuity to ground on connector X008 pin 20 .
A. If continuity is found, there is an open circuit in the front frame (FF) harness between connector X007 pin
28 and connector X008 pin 20 wire 748 blue. Locate the open and repair.
B. If no continuity is found, continue with step 6.
TOOL POSITIONING - LEVELLING
2 4/7/2006
G.30.A / 22